<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>标签规范</title>
</head>
<body>
    <div>第一个div标签</div>
    <div>第二个div标签</div>

    <span>第一个span标签</span>
    <span>第二个span标签</span>
</body>
</html>